CN108931691A - A kind of grounded screen impedance short distance on-line monitoring system - Google Patents
A kind of grounded screen impedance short distance on-line monitoring system Download PDFInfo
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- CN108931691A CN108931691A CN201811032437.8A CN201811032437A CN108931691A CN 108931691 A CN108931691 A CN 108931691A CN 201811032437 A CN201811032437 A CN 201811032437A CN 108931691 A CN108931691 A CN 108931691A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/20—Measuring earth resistance; Measuring contact resistance, e.g. of earth connections, e.g. plates
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Abstract
The invention discloses a kind of grounded screen impedance short distance on-line monitoring systems, it is related to electrical technology field, including programmable power supply unit (1), data acquisition unit (2), filtering unit (3), back-end data processing module (4), short distance measurement user's control software (5), communication unit (6) and external system (7)；Programmable power supply unit (1) is connect with test power supply, test power supply is connect with data acquisition unit (2), data acquisition unit (2) is connect with filtering unit (3), filtering unit (3) is connect with back-end data processing module (4), short distance measurement user's control software (5) is connect with including programmable power supply unit (1), data acquisition unit (2), filtering unit (3), back-end data processing module (4) respectively, and short distance measurement user's control software (5) is connect by communication unit (6) with external system (7).The configuration of the present invention is simple, monitoring cost is low, has very high market popularization value.
Description
Technical field
The present invention relates to electrical technology field, especially a kind of grounded screen impedance short distance on-line monitoring system.
Background technique
The performance parameter test of grounded screen is a many and diverse job, especially for large hydropower station earth mat, due to ground
Net larger, orographic condition is severe, and test setting-out work difficulty is very big, and very big difficulty is brought to test job, big at present
Mostly use transmission line of electricity that live unwrapping wire mode is replaced to measure, even if there is also line outages to be difficult to coordinate in this way, interferes sternly
The drawbacks such as again, so that the routine test work of large hydropower station earth mat is all difficult to carry out as scheduled, it is domestic in terms of on-line monitoring work
It is all outside blank out.
The present invention status big for large hydropower station earthed system difficulty of test is used according to the linear principles of circuit
Short distance calibrates measurement method realization to the on-line monitoring of the grounding resistance of large ground network, and the on-line system developed is adopted in data
Collection, transmission, processing and output process all use Digitalization Mode, between each subsystem with IEC61850 communication specification basis into
Row building, meets the networking secondary device layered structure of digital transformer substation, facilitates the expansion of later period implantation digital transformer substation
Open up work.Many drawbacks of common grounded screen parameter measurement mode, a kind of method that test process is simple and convenient of market in urgent need
Come the testing crew for making liberation vast.
In view of this, the present invention provides grounded screen impedance short distance on-line monitoring system.
Summary of the invention
The main object of the present invention is to provide a kind of ground connection of real-time monitoring grounded screen characterisitic parameter for capableing of short distance measurement
Net impedance short distance on-line monitoring system.
In order to solve the above technical problems, the present invention is achieved through the following technical solutions:
A kind of grounded screen impedance short distance on-line monitoring system provided by the invention, it is characterised in that: including programmable power supply unit,
Data acquisition unit, filtering unit, back-end data processing module, short distance measurement user's control software, communication unit and external system
System；Programmable power supply unit is connect with test power supply, and test power supply is connect with data acquisition unit, data acquisition unit and filtering
Component connection, filtering unit are connect with back-end data processing module, and short distance measurement user's control software is respectively and including programmable
Power supply unit, data acquisition unit, filtering unit, the connection of back-end data processing module, short distance measurement user's control software pass through
Communication unit is connect with external system；The programmable power supply unit is frequency conversion power unit, variable frequency signal source output frequency
For the stable power signal of f, f and power grid power frequency f0 offset are △ f；Power 5kW, using pulse wave width modulation technology, benefit
With high power IGBT module design, irregularity of wave form≤1%, frequency stability≤± 0.01%, can serial communication can also make
Use usb communication；It can be programmed control by USB, remotely realize self-starting/self-stopping technology, realize long-range frequency conversion voltage adjusting.
A kind of grounded screen impedance short distance on-line monitoring system, in which: the data acquisition unit is simulation number
According to collector, using the 16 road analog voltage amount collectors designed based on FPGA technology, 8 current data collectors, 24
Resolution ratio, frequency acquisition 50kHz.
A kind of grounded screen impedance short distance on-line monitoring system, in which: the filtering unit is digital lowpass filter
Wave device, using electronic countermeasure digital assay filtering technique, it can be achieved that high-precision frequency-selecting+self shifter technology.
A kind of grounded screen impedance short distance on-line monitoring system, in which: the short distance measurement user's control software
Including user's alternation of bed, Business Facade, Business Logic, data access layer and database.
A kind of grounded screen impedance short distance on-line monitoring system, in which: the short distance measurement user's control software
Write use it is open with C# for main development language, wherein including the filter of the i.e. virtual frequency-selecting technology of filtering unit frequency-selecting
Wave technology and background process algorithm.
A kind of grounded screen impedance short distance on-line monitoring system, in which: communication unit selects optical fiber or wireless telecommunications side
Formula, according to option and installment photoelectric converter and single mode optical fiber or wireless WIFI emitter；Communication between device feature uses
USB and serial communication.
A kind of grounded screen impedance short distance on-line monitoring system, in which: done using pure sine wave high-power signal source
To test power supply, multifrequency point acquires data.
The grounded screen impedance short distance on-Line Monitor Device, in which: user's alternation of bed is mainly responsible for: managing asking for user
It asks, makes corresponding response；One Controller is provided, appoints and calls service logic and the processing of other upper layers；It handles different
Often, throw to Struts Action；A model is provided for display；UI verifying.
A kind of grounded screen impedance short distance on-line monitoring system, in which: Business Facade is mainly responsible for: processing application
The service logic and business of program verify；Manage affairs；Interface with other layer of interaction is provided；Management business level is other
The dependence of object；A flexible mechanism is increased between expression layer and data access layer, is existed so that they do not contact directly
Together；Service logic (business is obtained by disclosing the context (Context) between expression layer to operation layer
Services).
A kind of grounded screen impedance short distance on-line monitoring system, in which: the SQL that database selects cost performance excellent
SERVER 2005, is directed to:
(1) rationally, clearly database table structure designs；
(2) rational design of associated data table critical field；
(3) reasonable definition of identification field；
(4) in table design, row, which becomes the mode of column, to be considered for the table structure of acquisition parameter, parameter.
By adopting the above-described technical solution, compared with prior art, the beneficial effects of the present invention are:
(1) it ensure that by high-precision frequency-selecting+self shifter technology according to the full-automatic switching range of the variation of ground resistance
In the measurement accuracy of high-low-range range.
(2) this system uses short distance measurement technology, finds the zero potential between electric current pole and tested earth mat by heuristic
Voltage pole is simultaneously laid at this by point, for by being tested earth mat, electric current pole, greatly for the linear circuit that forms, in electric current pole
In the case that position is fixed, which can't change with the change of test electric current, therefore can guarantee surveyed resistance value
The impedance ground value of as tested earth mat, to realize on-line monitoring function.
(3) the configuration of the present invention is simple, monitoring cost is low, has very high market popularization value.
Detailed description of the invention
Fig. 1 is structural block diagram of the invention.
Fig. 2 is long away from method test ground resistance figure.
Fig. 3 is short distance scaling method monitoring grounding resistance.
Fig. 4 is system principle schematic diagram.
Fig. 5 is the partial enlarged view of Fig. 4.
Fig. 6 is system structure diagram.
Fig. 7 is software architecture model.
Marked in the figure: 1, programmable power supply unit；2, data acquisition unit；3, filtering unit；4, back-end data handles mould
Block；5, short distance measurement user's control software；6, communication unit；7, external system.
Specific embodiment
Below in conjunction with attached drawing and preferred embodiment, to a kind of grounded screen impedance short distance on-line monitoring proposed according to the present invention
Specific embodiment, structure, feature and its effect of system, detailed description is as follows.
Referring to attached drawing 1-7, the present invention, which provides, uses following technical scheme:
A kind of grounded screen impedance short distance on-line monitoring system, including programmable power supply unit 1, data acquisition unit 2, filtering unit
3, back-end data processing module 4, short distance measurement user's control software 5, communication unit 6 and external system 7；Programmable power supply unit
1 connect with test power supply, and test power supply is connect with data acquisition unit 2, and data acquisition unit 2 is connect with filtering unit 3, filtering
Component 3 is connect with back-end data processing module 4, short distance measurement user's control software 5 respectively with include programmable power supply unit 1,
Data acquisition unit 2, filtering unit 3, back-end data processing module 4 connect, and short distance measurement user's control software 5 is single by communication
Member 6 is connect with external system 7；The programmable power supply unit 1 is frequency conversion power unit, and variable frequency signal source output frequency is f
Stable power signal, f and power grid power frequency f0 offset are △ f；Power 5kW is utilized using pulse wave width modulation technology
High power IGBT module design, irregularity of wave form≤1%, frequency stability≤± 0.01%, can serial communication also can be used
Usb communication；It can be programmed control by USB, remotely realize self-starting/self-stopping technology, realize long-range frequency conversion voltage adjusting；It is described
Data acquisition unit 2 be analog data acquisition device, acquired using the 16 road analog voltage amounts that are designed based on FPGA technology
Device, 8 current data collectors, 24 bit resolutions, frequency acquisition 50kHz；The filtering unit 3 is wave digital lowpass filter,
Using electronic countermeasure digital assay filtering technique, it can be achieved that high-precision frequency-selecting+self shifter technology；The short distance measurement
User's control software 5 includes user's alternation of bed, Business Facade, Business Logic, data access layer and database；Described
Writing for short distance measurement user's control software 5 uses opening with C# for main development language, wherein including filtering unit 3
Frequency-selecting, that is, virtual frequency-selecting technology filtering technique and background process algorithm；Communication unit 6 selects optical fiber or wireless communication mode, root
According to option and installment photoelectric converter and single mode optical fiber or wireless WIFI emitter；Communication between device feature using USB and
Serial communication；Using pure sine wave high-power signal source as test power supply, multifrequency point acquires data；Business Facade is called to connect
Mouth provides good interactive interface for final operation user, a part as realization.The items that Struts inherits MVC are special
Property, and the characteristics of according to J2EE, corresponding variation and extension are done, Struts is mainly responsible for: being managed the request of user, is made phase
The response answered；One Controller is provided, appoints and calls service logic and the processing of other upper layers；Processing is abnormal, throws to
Struts Action ；A model is provided for display；UI verifying；Spring in Business Facade is a Lightweight Container
(micro container), it well gets up object collocation.The clothes provided by Business Logic and data access layer
Business provides consistent funcall interface for user's alternation of bed, Spring in program it is involved comprising service logic with
The Objects of Data Access Objects (DataAccess Object) --- transaction management handler(thing
Business management control), Object Factories(object factory), service objects(serviced component) all by XML configuration
It connects.It is mainly responsible for: handling the service logic and business verification of application program；Manage affairs；It provides and other layer of phase
The interface of interaction；The dependence of the other object of management business level；A spirit is increased between expression layer and data access layer
Mechanism living, so that they do not link together directly；By disclosing the context between expression layer to operation layer
(Context) service logic (business services) is obtained；The SQL SERVER that database selects cost performance excellent
2005, it is directed to:
(1) rationally, clearly database table structure designs, and data is made to be easier to management, statistics and analysis calculating.
(2) rational design of associated data table critical field strengthens the recycling of general data, saves data and deposits
Store up space and access time.
(3) reasonable definition of identification field guarantees the uniqueness of data.
(4) in table design, row, which becomes the mode of column, is considered for the table structure of acquisition parameter, parameter, is reinforced
The versatility and scalability of database table.If new acquisition parameter is added in system, do not need to remodify table structure or
Program is modified, directly carrying out pertinent registration in systems can.This database is real client/server system knot
Structure, graphic user interface keep system administration and data base administration more intuitive, simple, programming interface tool abundant, for
Family carries out programming and provides bigger choice, and SQL Server and Windows server 2003 is fully-integrated, benefit
With many functions of Windows, such as transmission and received message, administrative login safety etc..
The present invention very well satisfies the needs of ground resistance on-line condition monitoring, realize data analysis, data show,
The functions such as real-time monitoring, report, parameter setting.System provides friendly user interface, easy to operate, easy to maintain, specifically
Feature is as follows:
(1) multi-channel synchronous monitors, and provides comprehensive measurement content；
(2) standard configuration of the present invention is acquired using 16 Channel Synchronous data, can be extended to 64 channels as needed, monitoring point quantity can expire
Foot overwhelming majority substation demand；
(3) accurate, reliable spectrum analysis and digital filtering technique are used；
(4) digital assay filtering technique is fought using military electronic, anti-interference ability is extremely strong, and selecting frequency characteristic is sharp, passes through height
Precision frequency-selecting+self shifter technology, full-automatic switching range ensure that the measurement accuracy in high-low-range range；
(5) system is safe and reliable to operation, using the user management based on permission, so that system is had very strong robustness, simultaneously
System user is set to manage richer hommization；
(6) powerful platform, software runs on currently a popular microemulsion sample injection platform, safe and stable, have it is stronger can
Scalability；
(7) data are shown vivid, and report is practical, beautiful user interface is friendly, easy to operate.
When system works, loop current is evoked in tested earth mat and electric current interpolar using high-power alien frequencies equipment, using more
Voltage waveform between each equipment under test of road voltage collector synchronous acquisition and voltage pole, by Filtering Analysis calculate each equipment with
Alien frequencies voltage difference between zero potential, to calculate the ground resistance of each equipment.
The system output frequency uses electronic countermeasure digital assay filtering technique, it can be achieved that high-precision frequency-selecting using military
+ self shifter technology, anti-interference ability is extremely strong, and selecting frequency characteristic is sharp, by high-precision frequency-selecting+self shifter technology, according to
The full-automatic switching range of the variation of ground resistance, ensure that the measurement accuracy in high-low-range range.Variable frequency signal source output frequency
Rate is the stable power signal of f, and f and power grid power frequency f0 offset are △ f.High-power signal enters transformer, and coupling will be set
Standby and equipment blocking, matching circuit impedance export biggish signal.The electric current I, Yi Ji of earth mat are flowed through in principle by measurement
Ground generates pressure drop U on the net, then impedance ground is Z=U/I.Measure frequency conversion voltage signal, current signal obtains corresponding parameter.
For application system with C# for main development language, the system of building has good portable and platform-neutral,
System can be made, which not have to any source code of change, may migrate on new platform, be effectively protected the early investment of user.It answers
It must satisfy following requirements with system:
(1) platform independence, it is unrelated with hardware, operating system, database；
(2) program language of novel object-oriented, it is code reusability, expansible；
(3) powerful safeguard construction and strategy can prevent the invasion of rogue program or virus；
(4) multitask and parallel processing are supported by multithreading operating mechanism.
This system is to configuration requirement:
(1) hardware running environment:
CPU: Pentium 1000MHz or more (recommending Pentium 2000MHz or higher)；
Memory: 512M or more (recommends 1G or more)；
Display card: more than 256 color display pattern of standard VGA (recommend 16 above display patterns of color of SVGA)；
Display: support 1024 X 768 of resolution ratio and its more than；
Network interface card: the network interface card (network interface card) of ICP/IP protocol is supported.
(2) software runtime environment:
The operating system platforms such as Windows 2000/XP/Win7, DirectX9.0, Microsoft SQL Server2000
(SP4) enterprise version database, Microsoft .Net Framework3.5.
The above described is only a preferred embodiment of the present invention, being not intended to limit the present invention in any form, appoint
What is to the above embodiments according to the technical essence of the invention any simply to repair without departing from technical solution of the present invention content
Change, equivalent variations and modification, all of which are still within the scope of the technical scheme of the invention.
Claims (10)
1. a kind of grounded screen impedance short distance on-line monitoring system, it is characterised in that: adopted including programmable power supply unit (1), data
Collect unit (2), filtering unit (3), back-end data processing module (4), short distance measurement user's control software (5), communication unit (6)
With external system (7)；Programmable power supply unit (1) is connect with test power supply, and test power supply is connect with data acquisition unit (2),
Data acquisition unit (2) is connect with filtering unit (3), and filtering unit (3) is connect with back-end data processing module (4), and short distance is surveyed
User's control software (5) are measured respectively and including programmable power supply unit (1), data acquisition unit (2), filtering unit (3), backstage
Data processing module (4) connection, short distance measurement user's control software (5) are connect by communication unit (6) with external system (7)；
The programmable power supply unit (1) is frequency conversion power unit, and variable frequency signal source output frequency is the stable power signal of f, f
It is △ f with power grid power frequency f0 offset；Power 5kW is set using pulse wave width modulation technology using high power IGBT module
Meter, irregularity of wave form≤1%, frequency stability≤± 0.01%, can serial communication usb communication also can be used；USB can be passed through
It is programmed control, self-starting/self-stopping technology is remotely realized, realizes long-range frequency conversion voltage adjusting.
2. a kind of grounded screen impedance short distance on-line monitoring system according to claim 1, it is characterised in that: the data
Acquisition unit (2) is analog data acquisition device, using the 16 road analog voltage amount collectors designed based on FPGA technology, 8
Current data collector, 24 bit resolutions, frequency acquisition 50kHz.
3. a kind of grounded screen impedance short distance on-line monitoring system according to claim 1, it is characterised in that: the filtering
Component (3) is wave digital lowpass filter, using electronic countermeasure digital assay filtering technique.
4. a kind of grounded screen impedance short distance on-line monitoring system according to claim 1, it is characterised in that: the short distance
Measuring user's control software (5) includes user's alternation of bed, Business Facade, Business Logic, data access layer and database.
5. a kind of grounded screen impedance short distance on-line monitoring system according to claim 1, it is characterised in that: the short distance
Writing for measurement user's control software (5) uses opening with C# for main development language, wherein including filtering unit (3)
Frequency-selecting, that is, virtual frequency-selecting technology filtering technique and background process algorithm.
6. a kind of grounded screen impedance short distance on-line monitoring system according to claim 1, it is characterised in that: communication unit
(6) optical fiber or wireless communication mode are selected, according to option and installment photoelectric converter and single mode optical fiber or wireless WIFI emitter；Dress
The communication between component is set using USB and serial communication.
7. a kind of grounded screen impedance short distance on-line monitoring system according to claim 1, it is characterised in that: use pure sinusoid
Wave high-power signal source acquires data as test power supply, multifrequency point.
8. a kind of grounded screen impedance short distance on-line monitoring system according to claim 4, it is characterised in that: user's alternation of bed
It is mainly responsible for: managing the request of user, make corresponding response；One Controller is provided, appoint call service logic and
Other upper layer processing；Processing is abnormal, and throw to Struts Action；A model is provided for display；UI verifying.
9. a kind of grounded screen impedance short distance on-line monitoring system according to claim 4, it is characterised in that: Business Facade
It is mainly responsible for: handling the service logic and business verification of application program；Manage affairs；It provides and is connect with what other layers interacted
Mouthful；The dependence of the other object of management business level；A flexible mechanism is increased between expression layer and data access layer, is made
Them are obtained not link together directly；Industry is obtained by disclosing the context (Context) between expression layer to operation layer
It is engaged in logic (business services).
10. a kind of grounded screen impedance short distance on-line monitoring system according to claim 4, it is characterised in that: database choosing
With SQL SERVER 2005, it is directed to:
(1) database table structure designs；
(2) design of associated data table critical field；
(3) definition of identification field；
(4) in table design, row, which becomes the mode of column, to be considered for the table structure of acquisition parameter, parameter.
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| CN201811032437.8A CN108931691A (en) | 2018-09-05 | 2018-09-05 | A kind of grounded screen impedance short distance on-line monitoring system |
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| CN201811032437.8A CN108931691A (en) | 2018-09-05 | 2018-09-05 | A kind of grounded screen impedance short distance on-line monitoring system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112098730A (en) * | 2020-09-15 | 2020-12-18 | 广东电网有限责任公司 | Ground impedance measurement system and method |
| WO2022194857A1 (en) * | 2021-03-19 | 2022-09-22 | Dehn Se | Multi-channel automated earth ground resistance system and method for measuring earth ground resistance |
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| CN102707167A (en) * | 2012-05-18 | 2012-10-03 | 华中科技大学 | State monitoring system for grounding grid based on industrial personal computer |
| CN105785135A (en) * | 2016-04-11 | 2016-07-20 | 国网安徽省电力公司电力科学研究院 | Frequency conversion ground impedometer |
| CN107290592A (en) * | 2017-07-04 | 2017-10-24 | 河南天通电力有限公司 | Grounded screen electric resistance on-line monitoring system |
| CN208953618U (en) * | 2018-09-05 | 2019-06-07 | 贵州南源电力科技股份有限公司 | Grounded screen impedance short distance on-Line Monitor Device |
-
2018
- 2018-09-05 CN CN201811032437.8A patent/CN108931691A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102707167A (en) * | 2012-05-18 | 2012-10-03 | 华中科技大学 | State monitoring system for grounding grid based on industrial personal computer |
| CN105785135A (en) * | 2016-04-11 | 2016-07-20 | 国网安徽省电力公司电力科学研究院 | Frequency conversion ground impedometer |
| CN107290592A (en) * | 2017-07-04 | 2017-10-24 | 河南天通电力有限公司 | Grounded screen electric resistance on-line monitoring system |
| CN208953618U (en) * | 2018-09-05 | 2019-06-07 | 贵州南源电力科技股份有限公司 | Grounded screen impedance short distance on-Line Monitor Device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112098730A (en) * | 2020-09-15 | 2020-12-18 | 广东电网有限责任公司 | Ground impedance measurement system and method |
| WO2022194857A1 (en) * | 2021-03-19 | 2022-09-22 | Dehn Se | Multi-channel automated earth ground resistance system and method for measuring earth ground resistance |
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Application publication date: 20181204 |